package com.lb.tools.lbtools.tools;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
import com.thoughtworks.xstream.io.xml.XmlFriendlyNameCoder;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * @author zhangq
 * @desc xml转换工具
 */
public class XmlUtil {
    private static XStream xstream;

    static {
        xstream = new XStream(new DomDriver("UTF-8", new XmlFriendlyNameCoder("-_", "_")));
    }

    /**
     * xml转对象
     * @param inputXml
     * @param type
     * @return
     * @throws Exception
     * @desc // XML to object.
     */
    public static Object xml2Object(String inputXml, Class<?> type) throws Exception {
        if (null == inputXml || "".equals(inputXml)) {
            return null;
        }
        xstream.alias("xml", type);
        return xstream.fromXML(inputXml);
    }

    /**
     * 对象转xml
     * @param ro
     * @param types
     * @return
     * @throws Exception
     * @desc // object to XML.
     */
    public static String object2Xml(Object ro, Class<?> types) throws Exception {
        if (null == ro) {
            return null;
        }
        xstream.alias("xml", types);
        return xstream.toXML(ro);
    }

    /**
     * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。
     *
     * @param strxml
     * @return
     * @throws JDOMException
     * @throws IOException
     */
    public static Map doXMLParse(String strxml) throws JDOMException, IOException {
        strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");

        if (null == strxml || "".equals(strxml)) {
            return null;
        }

        Map m = new HashMap();

        InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
        SAXBuilder builder = new SAXBuilder();
        Document doc = builder.build(in);
        Element root = doc.getRootElement();
        List list = root.getChildren();
        Iterator it = list.iterator();
        while (it.hasNext()) {
            Element e = (Element) it.next();
            String k = e.getName();
            String v = "";
            List children = e.getChildren();
            if (children.isEmpty()) {
                v = e.getTextNormalize();
            } else {
                v = XmlUtil.getChildrenText(children);
            }

            m.put(k, v);
        }

        //关闭流
        in.close();

        return m;
    }

    /**
     * 获取子结点的xml
     *
     * @param children
     * @return String
     */
    public static String getChildrenText(List children) {
        StringBuffer sb = new StringBuffer();
        if (!children.isEmpty()) {
            Iterator it = children.iterator();
            while (it.hasNext()) {
                Element e = (Element) it.next();
                String name = e.getName();
                String value = e.getTextNormalize();
                List list = e.getChildren();
                sb.append("<" + name + ">");
                if (!list.isEmpty()) {
                    sb.append(XmlUtil.getChildrenText(list));
                }
                sb.append(value);
                sb.append("</" + name + ">");
            }
        }

        return sb.toString();
    }


}
